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sounds like the mem card is ruined, if you took mit out without un mounting it this can happen, download scandisk memory manager, withe the card installed run the app, if it doesnt find it the card is no good and get another, try the phone with the new one and should be ok
I BELIEVE THE REASON IS THE TYPE OF SD CARD.
THERE ARE SD AND SDHC. IF YOU ARE USING SDHC.
I BET THE ONE CARD THAT DOESNT READ IS AN HC. THIS IS ALSO TRUE WITH
OLDER CARD READERS. I HAVE AN OLDER AND NEWER CARD READER.
I JUST HAPPENED TO PUT AN OLDER SD CARD IN MY NEW POWERSHOT SD1300 AND IT READS FINE, ALL NEW CARDS SDHC WONT READ.
I BELIEVE SD IS UP TO 2GIGS AND SDHC IS 4GIGS AND HIGHER.
If you have an SD card in try removing that before you power up.
You may also want to try the hard reset.
Paper clip in the tiny hole by the card slot.
Push it in firmly whilst the unit is powered up (not too hard) for about 3 seconds then release
You may have to power down and then up again and even hold down the power button a little longer the first time you do this
The SD card may also need formatting properly.
This means it is not reading the SD card and that it needs to be re-formatted.
This is best done in a card reader and not the tomtom itself.
Right click on it and select format select FAT32 as the files system
Now connect the tomtom but don't let tomtom home run. exit TTH if need be.
You now ned to select your tom tom which will also show as a drive.
In windows explorer select tools then folder options. Click view and tick the box for "show hidden files and folders" It may warn you but you can ignore it.
Then just copy ALL the files from the tom tom to your sd card
DO NOT USE CUT AND PASTE !
Once all the files are on switch off the tom tom and insert the sd card
this also happened to my phone its not the memory card, its the phone...check if any of your front keyes on your keypad are broken too. Mine where and it was as if the memmory card didnt exist. If this happens you have a 1 year warranty with verizon and you can get a new env2 which is what i just did. they sent me a new one and it works perfectly.
Hi, i did the same thing with my tom tom 300 go, i fixed it by borrowing my mothers sd card from her tom tom 710, i put the card into a card reader and copied the hole card to my computer then copied it back onto my sd card out of my tomtom then put in mine and bingo it worked with all the fetchers that her tom tom had and the updated maps it still said it was a 300 but had the 710 stuff try this it worked for me it should work for you.